A COMPACT 2.4/5.2-GHZ RAT-RACE COUPLER ON GLASS SUBSTRATE

Sen Wang, Jie Ying Zhong
2011 Progress In Electromagnetics Research Letters  
This paper presents the design and implementation of a compact 2.4/5.2-GHz rat-race coupler on a glass substrate. Due to the low-loss substrate and thick metal layers, the process provides high-Q capacitors and inductors, and therefore the lumped rat-race coupler is practical. The coupler consists of three bandpass and one bandstop networks to achieve dual-band operations. The measured insertion losses at 2.4 GHz and 5.2 GHz are less than 2.7 dB and 1.9 dB. The measured return losses at the
more » ... n losses at the frequencies of interest are better than 20 dB. Moreover, the phase imbalances at the in-phase and anti-phase output ports are less than 3.9 • and 4 • at 2.4 GHz and 5.2 GHz, respectively. The chip size including all testing pads is merely 2.87 × 2.1 mm 2 which is comparable to on-chip levels.
doi:10.2528/pierl11050503 fatcat:5guv3eqdrvdndffiqbqh4p5sse